Skyworks’ series of silicon tuning varactors are used as the electrical tuning elements in voltage controlled oscillators (VCOs), voltage-variable analog phase shifters, and voltage tuned filters (VTFs). This family of diodes includes abrupt junction tuning varactors, useful for low loss, narrow band circuits and hyperabrupt junction varactors, useful for wide bandwidth VCOs and VTFs and wide phase range variable phase shifters.